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Java Spring Basics Modeling, Storing, and Presenting Data Using @PathVariable to Create a Dynamic Detail Page

Jordan George
Jordan George
9,926 Points
Posted by Jordan George
Jordan George
9,926 Points

model.put("gif", gif); meaning?

Does model.put("gif", gif) correspond to the gif.name in <img th:src="@{'/gifs/' + ${gif.name} + '.gif'}" alt="gif" />? I'm just having a hard time understanding the put for the ModelMap.

    @RequestMapping("/gif")
    public String gifDetails(ModelMap model) {
        Gif gif = new Gif("compiler-bot", LocalDate.of(2016,8,15), "Jordan George", true);
        model.put("gif", gif);
        return "gif-details";
    }


 <img th:src="@{'/gifs/' + ${gif.name} + '.gif'}" alt="gif" />

1 Answer

Alexander Nikiforov
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Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points
Alexander Nikiforov
.a{fill-rule:evenodd;}techdegree seal-36
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

When you type model.put("gif", gif), you put whole gif object with all its method and properties to be available in Thymeleaf template, like

  • ${gif.name} - corresponding to gif.getName()
  • ${gif.username} - corresponding to gif.getUsername()
  • ${gif.favorite} - corresponding to gif.isFavorite() (note how it takes boolean getters into consideration)

You can even use specific method on gif, if you want, you can write:

<img th:src="@{'/gifs/' + ${gif.getName()} + '.gif'}" alt="gif" />

You also can type just this 

<img th:src="@{'/gifs/' + ${gif} + '.gif'}" alt="gif" />

In this case toString() method will be used of gif object.

You can also put String someString = "some string" in the model model.put("string", someString). Then in Thymeleaf you can write like this:

<img th:src="@{'/gifs/' + ${string} + '.gif'}" alt="gif" />